<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8" />
    <title>title</title>
    <script src="hello.js"></script>
</head>
<body>
    <h1>hello</h1>

    <script>
        let a = 25;
        console.log(a);
        let b="bob"

        console.log(`hi,i am ${b},i am ${a} yeaers old.`);
    
        function add(a,b){
            let sum=a+b;
            return sum;
        }
        let result=add(1,2);
        console.log(result);
    </script>
</body>
</html>